Tool and equipment to connect a line onto a high voltage line



Aug. 5, 1969 J. L. MIXON. JR, ET AL 3,458,995

TOOL AND EQUIPMENT TO CONNECT A LINE ONTO A HIGH VOLTAGE LINE. OriginalFiled Oct. 29, 1964 8 Sheets-Sheet 1 mvsmoa FREDERICK W/zu/m Wfl/IL J.MIXON. JR, ET AL 3,458,996 TOOL AND EQUIPMENT T0 CONNECT A LINE Aug. 5,1969 ONTO A HIGH VOLTAGE LINE Original Filed 001.. 29, 1964 8Sheets-Sheet 2 INVENT OR.

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, TOOL AND EQUIPMENT TO CONNECT A LINE ONTO A HIGH VOLTAGE LINE OriginalFiled 001;. 29, 1964 8 Sheets-Sheet 3 INVENTOR- fm'oexlcf Witt/0M k/flm.line: [em/am N/xorv i- Aug. 5, 1969 J. L NMIXON, JR,, ETAL 3,458,996

TOOL AND EQUIPMENT TO CONNECT A LINE ONTO A HIGH VOLTAGE LINE OriginalFiled Oct. 29. 1964 8 Sheets-Sheet 4 INVENTOR- feroee/cx Mum/w Ham.

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Aug. 5, 1969 .1 L. MIXON. JR. ETA!- TOOL AND EQUIPMENT TO CONNECT A LINEou'ro A HIGH VOLTAGE LINE Original Filed Oct. 29, 1964 Feeomcx W/zu/mW/m 37 7155 [aw/mm /7/xcw 7k Aug. 5, 1969 J L. MIXON. JR. ET AL3,458,996

' TOOL AND EQUIPMENT TO CONNECT A LINE ONTO A HIGH VOLTAGE LINE OriginalFiled on. 29, 1964 s Sheets-Sheet e INVENTOR- fkeom/cr Mum/v Mm BYJ'nnes Lavmer lllxon J/a Aug. 5, 1969 J. MIXON, JR. ETAL 3,458,996 TOOLAND EQUIPMENT TO CONNECT A LINE ONTO A HIGH VOLTAGE LINE Original FiledOct. 29. 1964 8 Sheets-Sheet 7 PHOD HQT INVENTOR.

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Aug. 5, 1969 J L. MIXON, JR, ET AL TOOL AND EQUIPMENT TO CONNECT A LINEONTO A HIGH VOLTAGE LINE Original Filed Oct. 29. 1964 8 Sheets-Sheet 8 mmy m in M m. Kl. Ks m 0A f United States Patent ABSTRACT OF THEDISCLOSURE An explosively-operated power unit has a movable pin forpenetrating an end of a cartridge means and gear means operativelyconnected to the pin for moving the pin into and out of engagement withthe end of the cartridge means. The explosively-operated power unit isalso provided with a beveled opening in a sleeve surrounding I a beveledsection of a tubular means which prevents the tubular means from leavingthe sleeve means upon fracturing of a flange means adjacent the beveledsection on the tubular means.

This application is a division of application Ser. No. 407,510, filedOct. 29, 1964, now US. Patent No. 3,349,- 167.

This invention relates to a tool and equipment in conjunction therewithto connect a line onto a high voltage line.

The explosively-operated tool disclosed in US. patent applications, Ser.No. 215,562, filed Aug. 8, 1962, now U.S. Patent No. 3,212,534 and Ser.Nos. 341,282 and 341,283, filed Ian. 30, 1964, now US. Patent Nos.3,292,- 363 and 3,296,792 and assigned to the present assignee, areprimarily directed to the driving of a wedge member into a C-shaped bodymember to interconnect electrical lines via the actuation of anexplosive means. As can be discerned from a perusal of theseapplications, the concept is directed to the connection of a tap lineonto a through line via the connector assembly and this is accomplishedwhen the through line is in a de-energized condition or the through linehas a low voltage thereon. In view of the advantages of using theexplosively-operated tool to drive the wedge member relative to theC-shaped body connector member to interconnect the conductive members,it has become desirable to use a tool on elongated dielec tric polemeans carrying the tool and associated tool members for working on hotlines, i.e., high voltage conductors and hot line tools for connectinglines or tap lines thereto.

It is, therefore, a primary object of the present invention to providehot line tool means of the explosivelyoperated variety for connecting aconnector assembly onto high voltage conductor means.

Another object of the present invention is the method of applying aconnector assembly onto a high voltage conductor means.

A further object of the present invention is to provide a breech-nutassembly for use on existing explosivelyoperated tool means.

A still further object of the present invention is the provision of asafety feature in the power unit of the explosively-operated tool means.

An additional object of the present invention is the provision of anovel wedge of the connector assembly to facilitate the introductionthereof into the C-shaped body member.

Other objects and attainments of the present invention will becomeapparent to those skilled in the art upon a ice reading of the followingdetailed description when taken in conjunction with the drawings inwhich there are shown and described illustrative embodiments of theinvention; it is to be understood, however, that these embodiments arenot intended to be exhaustive nor limiting of the invention but aregiven for purposes of illustration and principles thereof and the mannerof applying them in practical use so that they may modify them invarious forms, each as may be best suited to the conditions of aparticular use.

In the drawings:

FIGURES 15 schematically illustrate the various steps involved inconnecting a conductive means onto a high voltage conductive means;

FIGURE 6 is a perspective view of the clamp means to hold the C-shapedbody member of the connection assembly;

FIGURE 7 is a cross-sectional view of FIGURE 6;

FIGURE 8 is an exploded perspective view of the wedge member andclamping means therefor;

FIGURE 9 is a view taken along lines 9-9 of FIG- URE 10;

FIGURE 10 is a view taken along lines 10--10 of FIG- URE 9;

FIGURE 11 is an exploded perspective view of a toolclamping means andcomplementary handling stick;

FIGURE 12 is a cross-sectional view of the tool-holding means inposition on a tool;

FIGURE 13 is a perspective view of the breech assembly for use on anexisting explosively-operated tool;

FIGURE 14 is a partial cross-sectional view of FIG- URE 13;

FIGURE 15 is a perspective view of the explosivelyoperated tool;

FIGURE 16 is a cross-sectional view of part of a prior art power device;

FIGURE 17 is a cross-sectional view of part of a power unit having asafety feature; and

FIGURES 18-20 are cross-sectional views of a new type wedge member inits preassembled condition, partially assembled condition and assembledcondition in a C-shaped body member, respectively.

Turning now to the drawings, and more particularly FIGURES 1-5, themethod of connecting a tap line TL to a high voltage line HVL will bedescribed. As shown in FIGURE 1, a piggy-back clamp member 1 ofconventional design has an end of tap line TL secured therein. Aconventional grip-all clampstick 2 engages threaded member 3 of clamp 1,and clamp 1, with tap line TL secured thereto, is raised by clampstick 2to the level of high voltage line HVL whereupon clamp 1 is engaged onthe high voltage line and clampstick 2 is rotated thereby rotating screwthread member 3 to secure clamp 1 onto the high voltage line, asillustrated in FIGURE 2. Clampstick 2 is then removed from the threadedmember of clamp 1. Tap line TL is now temporarily secured to highvoltage line HVL via clamp 1 and this is important since high voltageline is energized and has high voltage thereon.

A C-clamp member 4 has a C-shaped body member 5 of a connector assemblysecured therein via threaded member 6. Clampstick 2 is engaged on member6, and, via clampstick 2, C-clamp 4 and body member 5 secured thereinare raised to the level of the tap line and high voltage line and thetap line and high voltage line are disposed in respective bights ofC-shaped body member 5, as illustrated in FIGURE 3.

Stick 7 having a universal head 8 on one end thereof is used next. Awedge member clamping means 9 is secured onto universal head 8 via amating universal head 10. A wedge member 11 is secured in clamping means9 and stick 7 along with clamping means 9 and wedge member 11 securedthereto are raised to the position so that wedge member 11 is introducedbetween high voltage line HVL and tap line TL at the entrance ofC-shaped body member 5, as illustrated in FIGURE 3. Clampstick 2, havinga hammer member 12 thereon, is used to strike wedge member clampingmeans 9 in order to drive wedge member 11 partially within body member5, as illustrated in FIGURE 3. C-clamp 4 is removed from body member 5and clamping means 9 is removed from wedge member 11.

The connector assembly comprising C-shaped body member 5 and Wedgemember 11 partially disposed therein is now ready to be completelyassembled to secure tap line TL to high voltage line HVL viaexplosivelyoperated tool 13. Explosively-operated tool 13 is similar tothat disclosed in the above-mentioned patents 3,292,363 and 3,296,792,except that the tool has a breech assembly 14 which is different fromthe breech assembly set forth in these applications and will bedescribed in further detail hereinafter. Tool clamping means 15 has auniversal head member which mates with universal head 8 of stick 7,which permits an operator to raise tool 13 into position to engage theconnector assembly.

After tool 13 has been placed in position on the connector assembly,clampstick 2 is engaged with an operating member 17 of gear means 16 onbreech assembly 14. Upon rotation of clampstick 2 in one direction, thepower assembly of the tool is threadably moved within a frame of thetool until the end of the power assembly comes into engagement withwedge member 11. Breech assembly 14 is then struck with hammer member 12which actuates the power assembly thereby driving a ram member disposedtherein into engagement with wedge member 11 which drives same fullyinto C-shaped body member 5.

After wedge member 11 has been driven into C-shaped body member 5, asillustrated in FIGURE 5, to effect an interconnection between tap lineTL and high voltage line HVL, clampstick 2 is rotated in the oppositedirection to release the explosive gases within the firing chamber ofthe power assembly and to move the power assembly outwardly from wedgemember 11 so that tool 13 can be removed from the connector assembly viastick 7. Clamp 1 is removed from the tap line and high voltage linesince these lines are now mechanically and electrically interconnectedvia the connector assembly and this clamp would be unnecessary equipmenton these lines.

FIGURES 6 and 7 illustrate more clearly C-clamp 4. Leg 18 includes aninner radiused section 19 which merges with tapered surface 20. Section19 and tapered surface 20 accommodate different sizes of body members 5and, as can be discerned, the axis of member 6 is in alignment with thecenter of section 19 in order to engage a leg of body member 5, when itis disposed in section 19 or in engagement with tapered surface 20, asillustrated in FIGURE 7. Thus, C-shaped body member 5 is securely heldwithin C-clamp 4 by section 19, body portion 21 of clamp 4 and member 6or by tapered surface 20, body portion 21 and member 6 in accordancewith the size of body member 5. Spaced projections 22 extend outwardlyfrom leg 18 and these are used to move lines out of the way orstraighten lines or the like, when clamp 4 is engaged by clampstick 2,as illustrated in FIGURE 2. A hook 23 extends outwardly from bodyportion 21 and leg 18 and is useful for hOOking the clamp onto a line,when not in use. Hook 23 includes a radiused portion 24, the purpose ofwhich will be described hereafter.

Turning now to FIGURES 8-10, there is illustrated wedge member clampingmeans 9, which includes a wedgedshaped section 25, a U-shaped section 26extending outwardly therefrom and mating universal head 10. Holes 27 arelocated in the legs of U-shaped section 26 which receive a threadedmember 28 having a ringshaped section 29 disposed at right angles to thethreaded section. Universal head 10 is adapted to mate with universalhead 8 of stick 7 and lugs 10 of universal head 10 are adapted to meshwith lugs 8' of universal head 8 so that the universal heads can bedisposed at angular dispositions with respect to one another. Universalhead 8 has a threaded hole 8" disposed therein and universal head 10 hasa slot 10" disposed therein. A wing nut 30, as illustrated in FIGURE 11,extends through slot 10" and threadably engages threaded hole 8" whenthe universal heads are in engagement with one another and this wing nutsecures them in their engaged position.

The largest end of wedge member 11 is disposed within the legs ofsection 26 and threaded member 28 is moved within one of threaded holes27 until it locks the wedge member within U-shaped section 26, asillustrated in FIGURE 10. Wedged-shaped section 25 defines a sectionagainst which hammer member 12 engages to drive wedge member 11 withinbody member 5 between tap line TL and high voltage line HVL disposed inthe bight sections of body member 5, as illustrated in FIGURE 9. Afterwedge member 11 has been partially driven within body member 5, it isfrictionally held in this position by tap line TL and high voltage lineHVL, therefore, clamping means 9 is no longer required. Hook 23 of clamp4 is placed within ring-shaped section 29 of threaded member 28 andradiused portion 24 of hook 23 is utilized to loosen threaded member 28so that clamping means 9 can be easily removed from wedge member 11.

FIGURES 11 and 12 illustrate clamping means 15 which includes a matinguniversal head 10 similar to the one located on wedge member clampingmeans 9. Universal head 10 extends outwardly from block 31 whichincludes a bifurcated section 32, a tapered surface 33 extendingoutwardly from bifurcated section 32 and flange 34 extending outwardlyover a portion of tapered surface 33. A lever 35 is pivotally mounted inbifurcated section 32 and includes a section facing tapered surface 33and a section disposed within bifurcated section 32, as illustrated inFIGURE 12. A bolt 36 is threadably disposed within the section of lever35 disposed within bifurcated section 32 and the inner end of bolt 36 isadapted to engage inclined surface 37 and move lever 35 toward and awayfrom tapered surface 33 in accordance with the rotation of bolt 36.

As illustrated in FIGURE 12, tool clamping means 15 is clamped ontoframe F of tool 13 with flange 34 engaging an upper surface of frame Fand lever 35 engaging another surface of frame F which is underneath theupper surface against which flange 34 is in engagement. Upon rotation ofbolt 36 in one direction, lever 35 secures tool 13 within clamping means15 by forcing the upper surface against flange 34 and a side surface offrame F against the surface of clamping means 15 disposed between flange34 and tapered surface 33, as illustrated in FIGURE 12. Thus, toolclamping means 15 securely holds frame F of tool 13 therewithin.

Explosively-operated tool 13 is illustrated in FIGURES 13-15. Frame F issimilar to the frame of the tool disclosed in Patents 3,292,363 and3,296,792, and, therefore, need not be described any further. The sameis true with regard to externally-threaded coupling member 38, sleeve39, breech member 40, cartridge-ejection means 41, plug 42, sleeve 43,pin 44 and ram 45. Cartridge 46 is of the type disclosed in US. patentapplication, Ser. No. 239,618, filed Nov. 23, 1962, now US. Patent No.3,173,369. Plug 47, carrying pin 44, is threadably mounted within sleeve43 and is movable from a point adjacent plug 42 to engagement with pin48 mounted in sleeve 43. Plug 47 has a shaft 49 extending outwardlytherefrom. A beveled gear 50 is mounted on shaft 49 and is keyed to plug47 for movement therewith. A block 51 is rotatably mounted on shaft 49via bearing means 52 press-fitted within an aperture of block 51. A cap53 is threadably mounted on the end of shaft 49 and a pin 54 extendsthrough cap 53 in shaft 49 to secure them together. Cap 53 bottoms onthe end of shaft 49 which aligns the holes thereof in which pin 54 is tobe disposed as well as preventing cap 53 to move relative to shaft 49when this cap is struck with a hammer member which, if cap 53 movedrelative to shaft 49, the threads therebetween would have a tendency tobecome jammed thereby making it diflicult to remove cap 53 from shaft49, when desired. A washer 55 is disposed between block 51 and cap 53.

Another beveled gear 56 is rotatably mounted on an extension 57 of block51 via bearing means 58 pressfitted thereto. Beveled gear 56 is in meshwith gear 50 and define gear means 15, FIGURE 4. A washer 59 is disposedon a rivet section 60 of extension 57 and in engagement with an annularflange 61 of beveled gear 56. Rivet section 60 is peened over ontowasher 59 to secure washer 59 and beveled gear 56 onto extension 57 forrotation relative thereto. An operating member 17 has one end secured tobeveled gear 56 via pin 62 and the other end includes a ring 63. A slot64 is located in plug 47 and the threaded area thereof to allow gasesfrom cartridge 46 after it has been exploded to escape into theatmosphere. A surface 65 extends outwardly from the end of sleeve 43adjacent pin 48 and this surface is engaged by a pin 66 extendingoutwardly from beveled gear 50, as illustrated in FIGURE 14.

In operation, a cartridge 46 is placed within the chamber of breechmember 40 and breech assembly 14 with plug 47 in its rearwardmostposition is threadably mounted on breech member 40. After breechassembly 14 is mounted on breech member 40, operating member 17 isrotated which causes beveled gear 56 to rotate beveled gear 50, therebymoving plug 47 to its innermost position so that pin 44 penetrates theend of cartridge 46 and extends therewithin. In this position, pin 66 isin engagement with surface 65, thereby limiting the inner movement ofplug 47 within sleeve 43.

Upon further rotation of operating member 17 in the same direction, pin66 in bearing against surface 65 causes breech assembly 14, breechmember 40 and coupling member 38 to be rotated within threaded section67 of frame F until the end of coupling member 38 engages wedge member11, as illustrated in FIGURE 15. Upon cap 53 being struck by a hammermember, cartridge 46 is exploded in the manner disclosed in Patents3,292,363 and 3,296,792. Upon the actuation of cartridge 46, ram 45drives wedge member 11 into body member 5 and against die 68 to securewedge member 11 within body member 5.

After wedge member 11 has been driven into body member 5, operatingmember 17 is rotated in the opposit direction which moves plug '47 andpin 44 secured therto in a direction toward pin 48 via beveled gears 56and 50. As soon as pin 44 moves away from cartridge 46, the explosivegases contained within cartridge 46 pass through the hole made withinthe end of cartridge 46 via pin 44, through the opening in plug 42 inwhich pin 44 moves, into the area between plugs 42 and 47 and thenthrough slot 65 to the atmosphere. Operating member 17 is turned untilplug 47 engages pin '48 whereupon breech assembly 14, breech member 40,sleeve 39, coupling member 38 and ram 45 are moved away from theconnector assembly through threaded section 68. This is necessary inorder to move ram 45 away from the connector assembly so that tool 13can be removed therefrom.

In the power unit of the above-mentioned Patents 3,292,363 and 3,296,792as illustrated in FIGURE 16, coupling member 38 has a flange 69 whichabuts against a shoulder 70 of sleeve 39. Breech member 40 is threadablydisposed within sleeve 39, and ram 45 is mova'bly disposed in bores ofcoupling member 38 and breech member 40, as illustrated. A slot 71 isdisposed in the outer surface of flanges 69 and the head of a pin 72disposed in sleeve 39 is disposed within slot 71 in order to preventcoupling member 38 from rotating relative to sleeve 39. After repeateduse of the power unit, flange 69 is subjected to high impact and bendingloads for a very short period of time. Thus, a failure of flange 69would result in coupling member 38 moving free of sleeve 39 which couldresult in injury to an operator.

In order to prevent coupling member 38 from moving out of sleeve 39 inthe event that flange 69 fails, opening 73 of sleeve 39, through whichcoupling member 38 passes, is beveled and the part of coupling member 38in engagement therewith has a mating beveled surface, as illustrated inFIGURE 17. Thus, a failure of flange 69 would permit coupling members 38to move slightly; however, the angle of beveled opening 73 would engagethe corresponding beveled surface of coupling member 38 and stop thismember from moving out of sleeve 39, thereby preventing injury to theoperator. Because of the angle of beveled opening 73, tremendous forceis exerted in the direction of the arrow causing beveled opening 73 tocompress against the corresponding beveled surface of ram 45, therebyjamming the tool in order to prevent it from being used any further.

FIGURES 18-20 illustrate a novel concept with regard to wedge member 11which has radiused sections 74 and 75 disposed in the inclined sidesthereof. As can be discerned, radiused section 75 has at the smallestend of wedge member 11 another radiused section 76 which is inclinedmore than radiused section 75. Radiused sections 74 and 75 are formed soas to engage corresponding sizes of conductor members CM, i.e., theradius of sections 74 and 75 corresponds to the radius of the conductormember to be disposed therein. Thus, if the conductor members are thesame size, section 76 facilitates the insertion of wedge member 11between conductor members CM when they are disposed within the bightsections of body member 5 prior to wedge member 11 being completelydriven therewithin via a suitable driving tool.

With regard to the connection of a small conductor member and a largeconductor member within body member 5, it has been found that transversecrimping forces usually compress the small conductor member to a greaterdegree than the large conductor member. This is due to the followingreasons: (1) more cross-sectional area in the large conductor member;(2) greater force concentration on the smaller conductor member.

Due to the provision of radiused section 76 within radiused section 75,the transverse crimping forces take effect on a greater surface area ofthe large conductor member before they affect the small conductormembers.

As shown in FIGURE 18, wedge member 11 is placed between conductormembers CM and in FIGURE 19, wedge member 11 is placed into engagementwith the conductor members such that section 76 engages the topconductor member and section 74 is in engagement with the bottomconductor member. Wedge member 11 is now ready to be driven completelywithin body member 5 via a suitable driving tool, such as, for example,explosivelyoperated tool 13 described hereinabove. FIGURE 20 illustrateswedge member 11 completely driven within body member 5 with sections 74and 75 in engagement with the conductor members to effect an excellentmechanical and electrical connection therebetween. Prior to wedge member11 being driven within body member 5, it is disposed at an angularinclination with respect to the axis of body member 5, as illustrated inFIGURE 19. During the travel of wedge member 11 within body member 5(force from the power-operated tool) wedge member 11 rocks about thetransition point between sections 75 and 76 and aligns itself duringwhich time friction is reduced and forces are equalized onto theconductor members.

As can be discerned, there has been disclosd a unique method and toolmeans for connecting a connector assembly onto high voltage conductormeans, a novel breechnut assembly for use on existingexplosively-operating tool means, the provision of a safety feature inthe power unit of the explosively-operated tool means and a novel wedgemember of the connector assembly.

It will, therefore, be appreciated that the aforementioned and otherdesirable objects have been achieved; however, it should be emphasizedthat the particular embodiments of the invention, which are shown anddescribed herein, are intended as merely illustrative and not asrestrictive of the invention.

The invention is claimed in accordance with the follow- 1. Anexplosively-operated device comprising a frame member having a workarea, a power unit on said frame including a chamber therein, a rammember movably, disposed in said chamber, cartridge means adapted to beplaced in said chamber and provided with a hollow portion in which partof said ram member fits to define a closed chamber, said cartridge meanshaving an internal detonating means for disposition adjacent said rammember, pin means on said power unit for penetrating through the closedend of said cartridge means to allow release of explosion gases, andgear means operatively connected to said pin means to move same into andout of engage ment with the closed end of said cartridge means.

2. An explosively-operated device according to claim 1 wherein means areprovided on said power unit and frame to permit said power unit to beadjustable relative to said frame, means on said gear means and saidpower unit to adjust said power unit relative to said frame when saidpin means has penetrated or moved to a position away from the closed endof said cartridge means.

3. In an explosively-operated tool to drive one member relative toanother member comprising a frame member adapted to engage one of saidmembers, power unit means on said frame member including a chamber forreceiving an explosive means, a ram member movably mounted in said powerunit means and having a section adapted to be disposed in a hollowportion of said explosive means adjacent detonating means thereof, saidram member adapted to engage the other of said members, pin means insaid power unit means for penetrating the closed end of said explosivemeans, and gear means on said power unit means in operative engagementwith said pin means to move said pin means into and out of penetrationengagement with the closed end of said explosive means.

4. In an explosively-operated tool according to claim 3 wherein meansare provided on said power unit means and said frame member to permitsaid power unit means to be adjustable relative to said frame memberwhen said pin means has penetrated or moved to a position away from theclosed end of said explosive means.

5. In an explosively-operated power unit, a member having a flangethereon, sleeve means surrounding said flange and having a shoulder forengagement therewith to prevent said member from moving out of saidsleeve means in the direction of said shoulder, one end of said sleevemeans having a beveled opening adjacent said shoulder, said memberhaving a beveled surface adjacent said flange in mating engagement withsaid beveled opening, and means in said sleeve means to limit axialmovement of said member therein and upon failure of said flange saidbeveled opening and beveled surface prevent said member from leavingsaid sleeve means through the beveled opening.

6. In an explosively-operated unit according to claim 5 wherein meansare provided on said member and sleeve means to prevent relativerotation therebetween.

7. An explosively-operated power unit comprising breech means forreceiving an explosive means, a tubular member having one end providedwith flange means, sleeve means surrounding said flange means andincluding shoulder means, means connecting said sleeve means to saidbreech means, said shoulder means and said breech means maintaining saidflange means within said sleeve means for limited movement of saidflange means therebetween, and means adjacent said flange means andshoulder means to prevent said tubular member from leaving said sleevemeans upon fracturing of said flange means.

8. An explosively-operated power unit according to claim 7 wherein saidlast-mentioned means comprises beveled-surface means.

9. An explosively-operated power unit comprising sleeve means having abeveled opening, shoulder means on said sleeve means adjacent saidbeveled opening, tubular means having a beveled end and flange meansadjacent said beveled end, said beveled end and flange means disposedwithin said sleeve means with said beveled end being mateable with saidbeveled opening and said flange means being engageable with saidshoulder means to limit movement of said beveled end in one direction insaid sleeve means, and breech means connected to said sleeve means tolimit movement of said beveled end in another direction in said sleevemeans, said beveled end and said beveled opening preventing said tubularmember from leaving said sleeve means through said beveled opening uponfracturing of said flange means.

References Cited UNITED STATES PATENTS 3,218,096 11/1965 Press ass-554x3,292,363 12/1966 Wahl 26.l

FOREIGN PATENTS 652,429 4/1951 Great Britain.

CARROLL B. DORITY, 1a., Primary Examiner US. Cl. X.R.

